How is the life expectancy of an owl calculated?

Owls in captivity generally live twice as long as in a wild habitat. Owl species vary greatly in behavior, habitat and life expectancy. Some are nocturnal, others are diurnal, and some are crepuscular (only out at dawn & dusk). read more

There are more than 200 species of owls and depending on the species, an owl's life expectancy can range from 1 year for a short-lived species, such as the barn owl, to as long as 10 years in the case of a screech owl. read more

Based on over 8,000 BTO ring recoveries, it has been calculated that the average life expectancy of all British Barn Owls above 5 weeks old is just less than 18 months. Mortality in nestlings is often overlooked. read more